You may be misunderstanding me or perhaps I didn't state my thoughts clearly enough. There is considerable statistical evidence that stuttering is passed in genetically. There isn't however any biological evidence as of yet, though they've only begun biological study relatively recently. I did get some of my numbers confused, however. After a little digging I found the following: About 20% of children between 2 & 5 develop a stutter at some point. About 75% outgrow it naturally. Just under 1% of the population stutters. I'm speaking just from personal experience as a life long stutterer and from what I've read over the years. I believe that simply because you have inherited the genetic material for stuttering you aren't destined to become a stutterer. Much like a child of an alcoholic will be predisposed to it, but not fated to it. Growing up I went through at least a dozen different therapy programs. Every year in school I had a new speech therapist with a different therapy, none of which did much good and a number of them actually made it worse, especially negative reinforcement. It wasn't until I discovered PFSP in my late 20s that I found a therapy that did some good. My point is that if your young child is going through a bit of disfluency making a big deal out of it may cause more harm than good. Anecdotal as it is, I believe that's what happened with me. It wasn't so much that my mother put me in therapy as it was her behavior made the situation more stressful than it already was. If your child maintains that disfluency for more than 6 months or so then absolutely take them to a good experienced speech therapist. But don't stress them out over it either. Edit: words cuz mobile